CN101039329A - Media delivery system of network TV system based on media delivery - Google Patents

Media delivery system of network TV system based on media delivery Download PDF

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CN101039329A
CN101039329A CN 200610156601 CN200610156601A CN101039329A CN 101039329 A CN101039329 A CN 101039329A CN 200610156601 CN200610156601 CN 200610156601 CN 200610156601 A CN200610156601 A CN 200610156601A CN 101039329 A CN101039329 A CN 101039329A
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content
service
media
system
streaming
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CN101039329B (en
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李木金
徐火顺
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中兴通讯股份有限公司
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Abstract

The present invention discloses a media delivery system of a web TV system with basis of media delivery, which includes: a service attempering/controlling module and a content attempering/controlling module located at a media delivery manager and/or a media delivery agent for realizing functions of content issuance, content deletion/aging and load equalizing; a content memorizing module disposed at a stream media delivery system executing documents operation and documents storage; a stream service module arranged at the stream media delivery system for carrying out living broadcast service, order program service, time-shifted TV, TV recording/broadcasting and bandwidth control; a content distributing/transmitting module located at the media delivery manager, the media delivery agent and/or the stream media system for executing living broadcast distribution, order program distribution and TV recording; and a maintaining operation module disposed at the media delivery manager, the media delivery agent and/or the stream media system for operating maintenance. Based on this invention, a TPTV system platform with excellent capability, low cost and upstanding expansibility can be realized.

Description

基于媒体交付的网络电视系统的媒体交付系统 Web-based media delivery system of the television media delivery system

技术领域 FIELD

本发明涉及通信领域,并且特别地,涉及一种基于媒体交付的网络电视系统的媒体交付系统。 The present invention relates to the field of communications, and in particular, to a media network based media delivery system of the television delivery system.

背景技术 Background technique

随着因特网网络电视(IPTV)业务的深入开展,IPTV的内容和用户的数量不断增加,媒体交付(CDN)网络的覆盖范围也不断扩大,这就要求IPTV系统的媒体交付系统具有较强的可扩展性。 With the development of Internet business Internet TV (IPTV), the number of IPTV content and users continues to increase, media delivery (CDN) network coverage has been expanded, which requires the IPTV system has a strong media delivery system can scalability. 因此,对基于CDN结构的IPTV系统的媒体交付系统的架构提出了较高的要求。 Therefore, the architecture of IPTV system based media delivery system CDN architecture put forward higher requirements.

现有的专利文献包括:专利申请号为CN200510065766的中国专利申请“分布式多媒体流式传输系统及媒体内容分发的方法和设备”。 Patent Document existing comprising: Chinese Patent Application No. CN200510065766 Patent Application "Distributed systems and multimedia streaming media content distribution method and apparatus."

其中,第CN200510065766号中国专利申请存在以下不足:CDN软件系统在网络部署上大的以城域网为一个单位,并且有一个城域网作为Headquarter City;以及影响了系统的可扩展性。 Among them, Chinese patent application No. CN200510065766 the following deficiencies: CDN software systems on the network to deploy a large metropolitan area as a unit, and has a metropolitan area as Headquarter City; and the impact of the system's scalability.

为此,如何设计出一种基于CDN结构的IPTV系统的媒体交付系统,使其具有很强的可扩展性和优良的性能,已经成为尤其是IPTV系统的媒体交付系统设计上必须要解决的一个重要课题。 To do this, how to design a media delivery system based CDN IPTV system structure, it has strong scalability and excellent performance, it has become a media, especially on IPTV delivery system design system that must be addressed important topic.

发明内容 SUMMARY

考虑到上述问题而做出本发明,其主要目的在于提供一种基于CDN结构的IPTV系统的媒体交付系统的架构。 The present invention is made in consideration of the above problems, and its main object to provide a media-based IPTV system configuration of a delivery system CDN architecture.

为了实现上述目的,根据本发明的实施例,提供了一种基于媒体交付的网络电视系统的媒体交付系统。 To achieve the above object, according to an embodiment of the present invention, there is provided a media delivery system based on network television media delivery system.

该系统包括:服务调度/控制模块和内容调度/控制模块,位于媒体交付管理器和/或媒体交付代理器,用于实现内容发布、内容删除/老化、以及负载均衡功能;内容存储模块,位于流媒体系统,用于进行文件操作和文件存储;流服务模块,位于流媒体系统,用于进行直播服务、点播服务、时移电视、电视录播、和带宽控制;内容分发/传送模块,位于媒体交付管理器、媒体交付代理器、和/或流媒体系统,用于进行直播分发、点播分发、电视录像;以及维护操作模块,位于媒体交付管理器、媒体交付代理器、和/或流媒体系统,用于进行操作维护。 The system includes: service dispatch / control module, and content scheduling / control module, located in Media Delivery Manager and / or the media delivery agent for implementing content distribution, content deletion / aging, and load balancing; content storage module is located streaming media system for file storage and file operations; streaming service module, located in streaming media system, for broadcast services, VOD services, time-shifted TV, TV recording and broadcasting, and bandwidth control; content distribution / transfer module, located in media delivery Manager, media delivery agent, and / or streaming media system for distributing broadcast live, on-demand distribution, video recording; and a maintenance module, located in media delivery management, media delivery agent, and / or streaming system for operation and maintenance.

其中,服务调度/控制模块和内容调度/控制模块对指定内容进行即时删除/老化、定时删除/老化、或根据访问量设置删除/老化门限。 Among them, the service scheduling / control module, and content scheduling / control module to specify the content instantly deleted / Aging, regularly delete / aging, delete or set according to traffic / aging threshold. 并且,服务调度/控制模块和内容调度/控制模块将用户点播请求在多个分布式流媒体节点之间进行自动的任务分配和负载均衡。 And the service scheduling / control module and a content scheduling / user demand request control module for automatic task allocation and load balancing between the plurality of distributed media streaming node.

另外,服务调度/控制模块和内容调度/控制模块将用户的点播请求按照预定规则分配到适当的边缘节点,其中,预定规则包括:按照网络范围分配、按照节点健康度和相关依赖关系分配、按顺序服务优先级分配、按本地服务优先级分配。 Further, the service scheduling / control module and a content scheduling / control module of the user's on-demand request is assigned to the appropriate edge node in accordance with a predetermined rule, wherein the predetermined rule comprises: allocating according to the network range, distributed according to the health of the node and the associated dependencies, press order of service priority assignment, the priority assigned by local services.

其中,在点播请求被分配到边缘节点之后,边缘节点的局部负载均衡器根据特定因素在本节点的多个媒体服务器之间进行负载均衡,其中,特定因素包括:节目存放位置、并发流流量、并发流个数、服务器资源消耗。 Wherein, after the on-demand request is assigned to an edge node, an edge node of the local load balancer performs load balancing between the plurality of media servers according to factors specific to this node, wherein the specific factors comprising: a program storage position, concurrent streams flow, The number of concurrent streams, server resource consumption.

另外,该系统中的内容存储模块以基于文件的存储方式或基于流化处理后的文件的存储方式来存储媒体内容。 Further, in the system based on the content storage module file storage or file-based storage of streamed content to the storage medium. 内容存储模块在边缘存储高热度的内容,并根据内容的热度和服务提供商/内容提供商的资源状态动态地调整内容的分布。 Edge content in the content storage module storing high heat, and to dynamically adjust the heat distribution of the contents according to the contents of the service provider and resource status / content providers. 流服务模块将直播电视以实时流的方式推送到全部覆盖地区的边缘服务器上。 The live TV streaming service module by way of real-time streaming pushed to cover all areas on the edge server.

其中,流服务模块管理多个业务运营商的并发视频服务,对每个业务运营商的并发数进行配额管理,其中,不同的业务运营商使用独占的流媒体服务并发数。 Among them, the streaming service module to manage multiple service operators concurrent video services, quota management for each of the number of concurrent service operators, where operators use different business exclusive of the number of concurrent streaming media services.

另外,流服务模块按照点播节目的热度,将热度高的节目调度到边缘节点,将冷门节目调度到一级节点,其中,当点播的内容存在于边缘节点时,边缘节点的相应流媒体服务器向用户发送媒体流,当点播的内容不存在于边缘节点时,调度存在内容的一级节点或区域一级节点向用户发送媒体流。 Further, according to the heat demand streaming service program module, the program schedule high heat to the edge nodes, to a scheduling program popular node, wherein, when the on-demand content is present in the edge node, the corresponding streaming media server to the edge node the user sending the media stream, when the on-demand content does not exist in the edge node, a node or a node region where the content of the media stream to the user scheduled transmission.

并且,在该系统中,流服务模块支持服务质量控制,还能够设置每个节点向用户提供流服务的最大带宽和最大连接数目。 Further, in this system, streaming service quality of service control module supports, it can also be provided maximum bandwidth and the maximum number of connections per node providing a streaming service to a user.

当内容分发/传送模块进行直播分发时,直播源通过单播方式或组播方式将内容分发到边缘节点,由边缘节点通过单播形式提供给用户。 When the content distribution / transmission module when live distribution, broadcast source by unicast or multicast content to be distributed edge node is provided to the user through the unicast edge node. 并且,当内容分发/传送模块进行直播分发时,直播源通过单播方式将内容分发到边缘直播流媒体服务器,边缘直播流媒体服务器进行组播后将内容分发到边缘业务接入控制点,边缘业务接入点通过接入层将内容提供给用户。 Further, when the content distribution / transmission module when live distribution, broadcast source by unicast distribution of content to the edge of the live streaming servers, live streaming edge servers to distribute content to the edge after the multicast service access control point, the edge access layer service access point providing content to the user.

通过上述技术方案,本发明可以提供一种高性能、低成本、并且具有良好扩展性的IPTV系统平台。 Through the above technical solution, the present invention can provide a high performance, low cost, and with good internet IPTV system scalability.

附图说明 BRIEF DESCRIPTION

此处所说明的附图用来提供对本发明的进一步理解,构成本申请的一部分,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。 The drawings described herein to provide a further understanding of the present invention, constitute a part of this application, exemplary embodiments of the present invention are used to explain the present invention without unduly limiting the present invention. 在附图中:图1是根据本发明实施例的基于媒体交付的网络电视系统的媒体交付系统框图。 In the drawings: FIG. 1 is a system block diagram according to the media delivery network television based media delivery system of an embodiment of the present invention.

具体实施方式 detailed description

下面将参考附图详细说明本发明。 The present invention will be described in detail below with reference to the accompanying drawings.

通常,一个典型IPTV系统的媒体交付系统包括:基于CDN结构的IPTV系统的媒体交付系统由媒体交付管理器(CDN Manager)模块、媒体交付代理器(CDN agent)模块和IPTV流媒体系统所组成。 Typically, the media a typical IPTV system delivery system comprising: a delivery system by the media delivery manager (CDN Manager) module, a media delivery agent (CDN Agent) module and IPTV streaming media system composed based media IPTV system CDN configuration.

在该典型配置中,CDN Manager模块提供与外部系统的接口,负责接入IPTV业务管理系统、IPTV内容管理系统和EPG系统,并且通过分布在各个流媒体节点上的CDN Agent来集中管理整个分布式流媒体系统的节点。 In this typical configuration, CDN Manager module provides an interface to external systems, is responsible for access IPTV service management system, content management systems, and IPTV EPG system, and centrally manage the entire distributed by the streaming media distributed among the nodes CDN Agent streaming media system node. CDN Manager模块具有全局负载均衡、资源监控与管理、内容分发、调度与控制的功能,并能够保存设备信息、服务状态和网络配置数据等。 CDN Manager module has global load balancing, resource monitoring and management, content distribution, scheduling and control functions, and the ability to save equipment information, service status and network configuration data. CDN Manager模块由服务调度/控制模块、内容调度/控制模块、网络组建模块和操作维护子模块所组成。 CDN Manager module by the service scheduling / control module, the contents of the scheduling / control module, operation and maintenance and network building blocks composed of sub-modules.

CDN Agent负责管理本地的流媒体节点的负载均衡、内容分布、策略执行、分发策略与控制、资源监控与管理,以及与CDN Manager和流媒体服务器的通讯,并能够向CDN Manager上报本地内容的分布信息、设备状态信息、服务状态和节点配置数据。 CDN Agent manages load balancing local streaming node, content distribution and policy enforcement, distribution policy and control, resource monitoring and management, and communication and CDN Manager and streaming media server, and be able to report local content to a CDN Manager Distribution information, device state information, configuration data and the node service state. 它由服务调度/控制模块、内容调度/控制模块和操作维护模块所组成。 It is served by the scheduling / control module, the contents of the scheduling / control module and the maintenance module operation composed.

CDN Manager和CDN Agent担当IPTV系统的媒体交付系统的媒体控制的角色,而流媒体系统则提供媒体服务的功能。 CDN Manager and CDN Agent to play the role of IPTV media delivery system of media control system, and the system provides streaming media services function.

IPTV流媒体系统负责提供流服务、内容存储和内容分发/传送的功能,并向STB提供节目视频流服务。 IPTV streaming system is responsible for providing streaming services, content storage and content distribution function / transmission, and to provide a program video streaming service STB. 它由流服务模块、内容存储模块、内容分发/传送模块和操作维护模块所组成。 It consists streaming service module, a content storage module, the content distribution / transfer module consisting of operation and maintenance module.

因此,如图1所示,根据本发明的实施例的基于媒体交付的网络电视系统的媒体交付系统包括:服务调度/控制模块和内容调度/控制模块,位于媒体交付管理器和/或媒体交付代理器,用于实现内容发布、内容删除/老化、以及负载均衡功能;内容存储模块,位于流媒体系统,用于进行文件操作和文件存储;流服务模块,位于流媒体系统,用于进行直播服务、点播服务、时移电视、电视录播、和带宽控制;内容分发/传送模块,位于媒体交付管理器、媒体交付代理器、和/或流媒体系统,用于进行直播分发、点播分发、电视录像;以及维护操作模块,位于媒体交付管理器、媒体交付代理器、和/或流媒体系统,用于进行操作维护。 Thus, as shown in FIG. 1, according to the media delivery network-based television system of the present invention, an embodiment of a media delivery system comprising: a service schedule / control module and a content scheduling / control module, located at a media delivery manager and / or the media delivery agent for implementing content distribution, content deletion / aging, and load balancing; content storage module, located in the streaming media system for file manipulation and file storage; streaming service module, located in the streaming media system to be broadcast live service, VOD service, time-shifted TV, TV recording and broadcasting, and bandwidth control; content distribution / transfer module, located in a media delivery manager, media delivery agent, and / or streaming system for distributing broadcast, on-demand distribution, television video; and maintenance operations module, located in a media delivery manager, media delivery agent, and / or streaming media system, for operation and maintenance.

其中,服务调度/控制模块和内容调度/控制模块对指定内容进行即时删除/老化、定时删除/老化、或根据访问量设置删除/老化门限。 Among them, the service scheduling / control module, and content scheduling / control module to specify the content instantly deleted / Aging, regularly delete / aging, delete or set according to traffic / aging threshold. 并且,服务调度/控制模块和内容调度/控制模块将用户点播请求在多个分布式流媒体节点之间进行自动的任务分配和负载均衡。 And the service scheduling / control module and a content scheduling / user demand request control module for automatic task allocation and load balancing between the plurality of distributed media streaming node.

另外,服务调度/控制模块和内容调度/控制模块将用户的点播请求按照预定规则分配到适当的边缘节点,其中,预定规则包括:按照网络范围分配、按照节点健康度和相关依赖关系分配、按顺序服务优先级分配、按本地服务优先级分配。 Further, the service scheduling / control module and a content scheduling / control module of the user's on-demand request is assigned to the appropriate edge node in accordance with a predetermined rule, wherein the predetermined rule comprises: allocating according to the network range, distributed according to the health of the node and the associated dependencies, press order of service priority assignment, the priority assigned by local services.

对于服务调度/控制模块和内容调度/控制模块功能的具体描述如下:(1)内容发布CDN Manager能够接收来自内容管理系统的命令,将内容源或其他CDN节点上的内容下载到本节点内容存储媒体库中。 For the service scheduling / control module and a content scheduling / control module function is described as follows: (1) the content distribution CDN Manager to receive commands from the content management system, content on a content source or other CDN nodes downloaded to this node content storage media library. 并且发布的方式支持手工发布和自动发布。 And manual release issued by way of support and automated publishing.

CDN Manager节点能够根据任务的优先级、完成时间要求、网络带宽、当前分发任务列表以及分发策略等,产生一个内容调度计划,并能够预测任务的完成时间。 CDN Manager node can be based on the priority task completion time requirements, network bandwidth, current distribution task lists and distribution strategies, generate a content scheduling and the ability to predict the time to complete the task. CDN节点能够按照事先生成的内容调度计划,执行内容推送等操作。 CDN nodes can be created in advance in accordance with content scheduling, performs a push content and other operations.

(2)内容删除/老化支持灵活的内容删除策略,包括即时删除、定时删除,以及根据访问量设置的删除门限,将本节点流媒体资源库中的指定内容删除或者老化。 (2) delete the contents of / aging support flexible content removal policies, including instant delete, regularly delete, delete, and according to the set threshold visits, will specify the contents of this node streaming media repository deleted or aging.

(3)负载均衡功能支持完备的多层次的负载均衡机制,可以实现用户点播请求在多个分布式流媒体节点之间的自动地任务分配和负载均衡。 (3) fully supports load balancing and multi-level load balancing mechanism, users can achieve on-demand request distributed stream automatically assign tasks and load balancing between nodes in multiple media.

从逻辑层次上可以将负责均衡机制分为全局负载均衡机制和CDN节点内负载均衡机制两大类,这两种机制相互配合,最大程度上为IPTV用户提供高质量的服务。 From the logical hierarchy responsible for balancing mechanism can be divided into two major categories of load balancing mechanism within the global load balancing mechanism and CDN node, these two mechanisms complement each other, providing high-quality services for IPTV users the maximum extent. 上述的两类机制包括全局负载均衡功能与局部负载均衡机制。 The above-mentioned two types of mechanisms, including local and global load balancing load balancing mechanism.

其中,在全局负载均衡功能中:在CDN Manager具备将用户的每次点播请求按照一定的规则重定向到最适合的边缘节点进行处理,依据以下的分配规则:按网络范围分配,选择在网络上最“邻近”的边缘节点进行处理,其中的选择依据可以是根据用户的IP地址进行静态分配,也可以自动测试用户到边缘节点的网络连接速度等参数进行动态分配;按节点健康度和相关依赖关系分配,在点播过程中,如优先设定的CDN节点发生故障,系统将根据预先设定的CDN节点的依赖关系,对点播请求进行重定向,将正在进行的点播请求切换到新的CDN节点上;顺序服务优先,对点播请求按照“先到先处理”的原则进行服务;以及本地服务优先,对点播请求,按照优先处理本地用户的点播请求,再处理其他点播请求的原则进行服务。 Wherein the global load balancing function: CDN Manager provided in each user's demand request redirection edge node to the most suitable processing according to certain rules, according to the following rule: Network range assignment by selecting the network the most "adjacent" edge node processing, wherein the selection criteria may be statically allocated according to the user's IP address, may be automatically tested user to parameters of the network connection speed edge node like dynamic allocation; according to the health of the node and its dependencies distribution relationship, the demand process, such as the priority setting CDN node fails, the system will be based on dependence of the CDN node set in advance, on demand request to redirect the ongoing demand request to switch to the new CDN node on; priority order of service, requests for on-demand service in accordance with the principle "first come, first processing"; and a local service priority, a request for on-demand, according to the local user demand request priority, and then other principles demand service is requested.

在局部负载均衡机制中,CDN Agent支持局部负载均衡机制,用户的点播请求被分配到边缘节点后,边缘节点的局部负载均衡器将在本节点媒体服务器组的多个媒体服务器间进行负载均衡,根据节目存放位置、并发流流量、并发流个数、服务器资源消耗等综合因素,分配最合适的媒体服务器以响应该请求;并且,在点播过程中,如果点播流所在媒体服务器或网络联接发生故障,系统能够自动地记录失败点,并能够重新进行流媒体服务器负载均衡分配并将正在进行的点播流切换到新的流媒体服务器上以继续播放。 In the partial load balancing mechanism, CDN Agent supporting local load balancing mechanism, the user's on-demand request is assigned to an edge node, the local load balancer edge node load balancing among the nodes of the present group of media servers plurality of media servers, the combination of factors program storage position, concurrent streams flow, the number of concurrent streams, server resource consumption, the most appropriate allocation of the media server in response to the request; and, in the on-demand process, if the on-demand streaming media server or a network connection where the failure the system can automatically record the point of failure, and can be re-streaming server and a load balancing ongoing demand flow is switched to a new streaming media server to resume playing.

另外,在根据本发明实施例的该系统中,内容存储模块以基于文件的存储方式或基于流化处理后的文件的存储方式来存储媒体内容。 Further, in this embodiment of the system according to the present invention, the content storage module or file based storage for storing media content based on the file storage after the process stream. 内容存储模块在边缘存储高热度的内容,并根据内容的热度和服务提供商/内容提供商的资源状态动态地调整内容的分布。 Edge content in the content storage module storing high heat, and to dynamically adjust the heat distribution of the contents according to the contents of the service provider and resource status / content providers. 流服务模块将直播电视以实时流的方式推送到全部覆盖地区的边缘服务器上。 The live TV streaming service module by way of real-time streaming pushed to cover all areas on the edge server.

媒体内容需要占用大量的存储资源,一般需要采用分布式存储方式,包括基于文件的存储以及基于流化处理以后文件的存储两种。 Media content would take a lot of storage resources, generally require the use of distributed storage, including file-based storage based on store two later streamed files. 首先,在边缘存储热度最高的内容,之后再根据内容的热度和SP/CP(业务、服务提供商/内容提供商)的资源状态,动态调整内容的分布,达到内容在全网的动态分布。 First of all, at the highest edge of the content stored heat, then again according to the heat content and SP / CP (business, service providers / content providers) state resources dynamically adjust the distribution of content, dynamic content distribution reach in the whole network.

对于内容存储模块的具体功能描述如下:(1)文件操作功能提供流媒体文件/目录的创建、删除、修改、重命名、查询、读取、移动等基本功能,并且能够支持所有格式的文件存储。 For the content storage module specific functions described below: (1) create a file operation function provides the streaming media file / directory, delete, modify, rename, query, read, mobile and other basic functions, file storage and can support all formats . 其中,对于文件/目录的创建功能,除了支持系统管理人员添加新的媒体文件外,还要支持时移数据转存媒体文件的自动创建功能,对自动创建的流媒体文件,系统要能够自动对外提供流媒体服务。 Among them, for the ability to create file / directory, in addition to supporting the system administrator to add new media files, but also supports time-shifted data dump function to automatically create media files for streaming media files automatically created, the system should automatically Foreign provide streaming media services.

并且,能够支持手工文件删除功能,还进一步提供一定的自动删除功能,即系统能够定期删除不必要的垃圾文件,减少磁盘空间的浪费。 And to support the manual file deletion function, but also provide some further automatic delete function, that is, the system can remove unnecessary junk files regularly, reduce the waste of disk space.

(2)文件存储功能支持点播媒体文件存储功能、时移数据的存储功能。 (2) file storage capabilities to support on-demand media file storage capabilities, time shift storage function data.

其中,对于点播媒体文件的存储,能够尽可能地将数据分布到不同的存储设备上,以充分利用各个存储设备的I/O能力。 Wherein for storing on-demand media files, it can be distributed as much as possible to different data storage devices to take advantage of I / O capacity of each storage device. 对于时移数据存储支持配置存储的时长,对超时的数据系统自动清除。 For the duration of the time shift data storage support configuration store, automatically remove timeout data systems.

该功能具有良好的磁盘扩展能力,能够根据当前系统资源需求情况,增加或减少磁盘的数量。 This feature has a good disk expansion capacity, according to the current system resource demand, increase or decrease the number of disks.

(3)磁盘存储空间配置管理功能提供对多业务运营商的支持,不同的业务运营商能够使用不同的存储空间。 (3) disk storage configuration management capabilities provide support for multi-service operators, different business operators can use different storage space. 同时,为了业务运营商开展多种业务,用户空间可以进一步划分和管理。 Meanwhile, in order business operators to carry out a variety of business, user space can be further divided and management.

媒体库能够管理多个用户空间,对每个用户的空间可以进行配额管理。 Media Library can manage multiple user space for each user's space quota management can be. 每个用户的空间可以被划分为多个子空间,也可以对子空间进行配额管理。 Each user of the space can be divided into multiple sub-space, subspace can also quota management.

另外,在该系统中,流服务模块管理多个业务运营商的并发视频服务,对每个业务运营商的并发数进行配额管理,其中,不同的业务运营商使用独占的流媒体服务并发数。 Further, in this system, streaming service module to manage multiple concurrent video service operator service, the number of concurrent quota management of each service operator, which operators using different service exclusive concurrent streaming service.

另外,在该系统中,流服务模块按照点播节目的热度,将热度高的节目调度到边缘节点,将冷门节目调度到一级节点,其中,当点播的内容存在于边缘节点时,边缘节点的相应流媒体服务器向用户发送媒体流,当点播的内容不存在于边缘节点时,调度存在内容的一级节点或区域一级节点向用户发送媒体流。 Further, in this system, the service stream according to the heat demand program module, the program schedule high heat to the edge nodes, to a scheduling program popular node, wherein, when the on-demand content is present in the edge node, the edge node corresponding stream media server transmits the media stream to the user, when the on-demand content does not exist in the edge node, a node or a node region where the content of the media stream to the user scheduled transmission.

并且,流服务模块支持服务质量控制,还能够设置每个节点向用户提供流服务的最大带宽和最大连接数目。 A streaming service support quality of service control module, also possible to provide the maximum bandwidth and the maximum number of connections per node providing a streaming service to a user.

对于流服务模块功能的具体描述如下:(1)直播服务流模块能够将直播电视以实时流的方式推送到全部覆盖地区的边缘服务器上,以提供对多业务运营商的支持,并且,不同的业务运营商能够使用独占的流媒体服务并发数,互不影响。 For detailed description of the streaming service module functions as follows: (1) Live service flow module can be live TV by way of real-time streaming pushed to all the coverage on the edge server region to provide support for multi-service operators, and different business operators can use the streaming service number of concurrent exclusive of each other. 同时,为了业务运营商开展多种业务,业务运营商可以进一步划分服务并发数和管理。 Meanwhile, in order to carry out a variety of business service operators, service operators can further divide the number of concurrent service and management.

流模块能够管理多个业务运营商的并发视频服务,对每个业务运营商的并发数可以进行配额管理。 Flow module can manage multiple service operators concurrent video service, for each number of concurrent service operators can quota management.

流模块能够提供如下基本功能:流媒体系统可以接收单播或者组播源的码流,并且可以根据配置向客户端提供单播或者组播服务;使得流媒体系统具有从上级流媒体服务器中继频道的功能;无论单播或者组播,流媒体系统都可以存储码流,对客户端提供时移服务;以及能够在对于某一节点为用户实现频道提供服务的同时考虑到性能问题,即当某一频道的直播用户和时移用户很多时,能够做到频道直播码流(包含单播码流和组播码流)和时移存储码流在节点内部完成共享。 Flow module can provide the following basic functions: media streaming system may receive unicast or multicast stream source, and may provide a unicast or multicast service to the client according to the configuration; such that streaming media system having a relay from the upper streaming server channel function; whether unicast or multicast streaming system stream can be stored, when shifted service provided by the client; and to take into account certain performance problems for the user node while enabling a channel to provide services, i.e. when when a broadcast channel when the user and shift many users, it is possible to do channel broadcast stream (stream of unicast and multicast streams) and time-shifted stream is stored in the shared internal node completion.

在直播流程上,当用户访问电子节目单(EPG)时,EPG系统根据某种负载均衡算法使得用户分配给归属地的边缘节点为用户提供服务,在该情况下,连接连接方式为客户端返回边缘节点调度服务器的统一资源定位符(URL)链接,因此,客户端需要访问边缘节点调度服务器的URL链接,由边缘节点调度服务器进行节点内部资源估算,然后重定向到具体的流媒体服务器,向客户端提供单播或组播服务。 On the live process, when a user accesses the electronic program guide (EPG), EPG system according to some load balancing algorithm such that a user assigned to the edge node for home users to provide services, in this case, the connection method is returned to the client uniform resource locator (URL) link scheduling server edge nodes, and therefore, the client needs to access edge node URL link scheduling server, the scheduling server node by edge node estimates internal resources, and then redirected to the particular streaming media server, the The client provides unicast or multicast service. 当流媒体服务器进行服务提供或者建链提供时,需要验证用户的合法性,其中使用的验证算法和密钥是业务系统和流媒体系统约定的。 When the streaming media server to provide services or provide link establishment, need to verify the legitimacy of user authentication algorithm and key used is in business systems and streaming media system agreed.

另外,频道服务的提供大体上可以分为两个类型:对于单播直播频道方式的流媒体服务提供,客户端需要和流媒体服务器建立链接,同时由此服务器提供单播直播码流,当客户需要转换为时移电视时,可以由该流媒体服务器提供时移存储码流;对于组播直播频道方式的流媒体服务提供,客户端需要和流媒体服务器建立链接,然后客户端根据会话描述协议(SDP)中的信息接收组播地址码流,建链流媒体服务器不为客户端提供直播码流,当客户需要转换为时移电视时,则需要转换为由这个流媒体服务器提供时移存储码流。 In addition, providing a channel service can be divided into two types: unicast live channel streaming mode service providers, clients need to establish links and streaming media servers, thus providing server unicast live stream, when customers shift when the need to convert the time-shift TV, can be provided by the streaming media server that stores the code stream; for a multicast channel live streaming mode service provided, clients need to establish links and streaming media server, then the client according to the session description protocol receiving a multicast address information code stream (SDP) of the link establishment is not streaming media server provides a live stream to the client, when the client needs to convert the time-shift TV, you need to be converted by the shift storage when the stream media server stream.

(2)点播服务按照目前国内运营商组网现状,在提供用户服务时,能够尽量不占用一级节点和边缘节点之间的带宽应用,因为在目前状况下,带宽运营商的组网方式对于带宽没有充足保证,所以目前带宽需要优先保证实时码流中继业务(频道中继业务)和其他方式的业务。 (2) on-demand services in accordance with the current status of the domestic network operators, in the provision of customer service, try not to be able to use bandwidth between a node and edge nodes, because in the present situation, the bandwidth networking for operators Bandwidth is not enough to ensure that, we now need to give priority to ensuring the bandwidth real-time stream relay service (channel relay service) and other forms of business.

按照IPTV目前的组网方式,大部分用户的点播服务由边缘节点提供,仅仅小部分用户的点播服务由一级节点和区域一级节点提供服务。 According to the current networking IPTV, most users demand service provided by the edge node, only a small number of users demand services served by a node and a node region.

基于可以应用性和实用性,系统需要按照点播节目的热度,进行一定的调度,通常调度方法是,热度高的节目需要调度到边缘节点上,一些冷门节目需要调度到一级节点进行服务。 Based on practical and can be applied, according to the system needs heat demand program, certain scheduling, scheduling is generally high temperature required program schedule to the edge node, a number of popular programs need to schedule a service node.

在IPTV进行正式点播服务提供前,节目源需要按照一定的热度原则在整个CDN网络上进行合理分布,一般分布原则是最高热度的节目调度到边缘节点,并且能够调度到各个服务器的私有存储空间,其他普通节目需要调度到所有的CDN节点;当节目的热度特性随着时间的推移发生变化时,系统需要随时对节目的IPTV系统分布进行自动存储位置和调度方式进行更新。 Before a formal demand services provided in IPTV, program source needs to be reasonably distributed throughout the CDN network in accordance with certain degree of heat principle, the general distribution principle is the highest heat of the program schedule to the edge nodes, and is scheduled to private storage space for each server, other ordinary program to be scheduled for all CDN node; when a change in the heat generating property of the program over time, the system of the need to keep the IPTV system program for automatic storage locations and distributed scheduling mode for updates.

系统支持点播服务,用户可以自由选择内容,自由地在观看时控制播放过程。 The system supports on-demand service, users are free to choose the content, the freedom to control playback when watching. 当点播的内容在边缘节点存在时,由边缘节点相应流媒体服务器向用户发送媒体流。 When the on-demand content in the presence of the edge node by edge node corresponding to the streaming server sends the media stream to the user.

当点播的内容在边缘节点不存在时,系统调度到存在此内容的一级节点或者区域一级节点为用户提供服务。 When the on-demand content does not exist in the edge node, the system operator to a node or a regional node exists for this content to users.

系统进行点播服务时,可以实现可变倍速的快进和快退,可以实现定位播放功能,可以进行暂停、播放功能,暂停后恢复播放做到无缝播放。 While the system is on-demand service, you can achieve variable speed fast forward and rewind, playback can achieve positioning function, you can pause, playback, resume play after pause achieve seamless playback. 点播播放过程中具有一键切换到点播的文件头和点播的文件尾功能。 Demand has a playback button to switch to the file header and file trailer demand of the demand function. 并且,以上特效功能之间可以相互之间随意切换。 And, you can switch between the above mutual effects between the features.

当用户访问EPG时,如果点播节目属于冷门节点,仅仅存在于一级节点,EPG系统为客户端返回一级节点调度服务器的地址,客户端此时需要访问一级节点调度服务器,由一级节点调度服务器进行节点内部资源估算,然后重定向到具体的流媒体服务器进行服务提供。 When a user accesses the EPG, the program belongs to popular demand if nodes exist only in one node, the EPG system for the client node returns the address of a dispatch server, the client needs to access a case scheduling server node from a node scheduling server node estimates internal resources, and then redirected to the particular streaming media server to provide services. 同样,流媒体服务器进行服务提供时,需要验证用户的合法性,验证算法和密钥是业务系统和流媒体系统约定的。 Similarly, streaming media servers for service providers, users need to verify the legitimacy of the authentication algorithm and key business systems and streaming media are the system specifications.

(3)时移电视系统能够支持时移电视业务。 Shift TV system shifted TV service can be supported (3). 在时移电视业务中,流媒体节点在直播时,必须将流转储成流媒体文件存放到流媒体节点中,以提供时移电视业务功能。 In the time-shifted TV service, the streaming node when broadcast, must flow into the reservoir streaming media file stored in the streaming node, the mobile TV service in order to provide function.

存储在媒体库的流数据必须具有如下特性:可以记录时移数据的绝对时间信息,用户可以根据绝对时间收看时移节目;可以设置时移数据存储时长,存储时,媒体库的媒体存储时长到达规定的时移存储时间,存储的内容回绕循环存储。 Storage must have the stream data library of the following characteristics: absolute time information shift data time may be recorded, the user can watch in accordance with the absolute time-shifted program; long shift data is stored may be provided, when storing length reaches the media storage library of when the prescribed time-shift storage, content stored wrapping cycle storage.

时移电视业务提供如下功能:客户端可以在直播状态通过暂停、快退、定位播放进入时移状态;时移状态下支持暂停、恢复播放、快进、快退操作;在时移状态下通过快进、切回直播等操作切换到直播状态。 Time-shifted TV service provides the following functionality: client can live state by the pause, rewind, positioning play into the shift state; shifting state support pause, resume, fast forward, rewind operation; through in the time shift state fast forward switch back operation is switched to the live broadcast and other state.

(4)电视录播系统能够支持电视录播业务,可以根据录播计划,对每个频道按照时间段将缓存的直播节目内容转存为标准的可发布的独立媒体文件。 (4) television broadcasting system capable of supporting TV recording and broadcasting services, according to the recording and broadcasting programs for each channel in accordance with the time period cache live broadcasts of independent media content dump file can be released as a standard. 对每个频道提供时间段媒体文件链接,用户可以有选择地点播频道特定时间段节目回放。 Each channel provides a time period for a media file link, users can selectively view channels specific period of time the program playback.

电视录播包括以下过程:执行已有录播计划,把缓存的直播节目内容按设定时间段转存为标准的可发布的独立媒体文件;转存生成的片段文件可以根据一定的策略推送到边缘节点服务器;每个频道录播生成的媒体文件可以根据一定的策略进行发布,用户可以有选择的点播回放,其流程与点播业务流程相同。 TV recording and broadcasting includes the following processes: the implementation plan has been taped, the cache of live programming content at a set time period for the standard dump file can be released independent media; fragments generated dump file can be pushed based on a certain strategy edge node server; each channel recording and broadcasting media files can be generated based on a certain strategy release, users can have a choice of on-demand playback, the same as its processes and on-demand business processes.

(5)带宽控制为保证视频直播和点播的效果,系统支持服务质量控制(QoS)。 (5) bandwidth control to ensure the effects of live and on demand video, the system supports Quality of Service control (QoS).

系统能够设置每个节点向用户提供流服务的最大带宽和最大连接数目,以保证在线用户的体验效果;同时系统在指定/执行节目分发时需要考虑节目分发所占带宽对提供流服务带宽的影响,通过采用合理的分发时间、控制分发带宽等策略,尽量做到不影响系统提供流服务的质量。 The system can be set for each node to provide streaming services to users maximum bandwidth and maximum number of connections, in order to guarantee the experience of online users; while the system when you specify / execution program distribution program distribution need to consider the impact on the bandwidth occupied bandwidth to provide streaming service by the time the use of reasonable distribution, distribution bandwidth control strategy, as far as possible without affecting the quality of the system to provide streaming services.

当内容分发/传送模块进行直播分发时,直播源通过单播方式或组播方式将内容分发到边缘节点,由边缘节点通过单播形式提供给用户。 When the content distribution / transmission module when live distribution, broadcast source by unicast or multicast content to be distributed edge node is provided to the user through the unicast edge node. 并且,当内容分发/传送模块进行直播分发时,直播源通过单播方式将内容分发到边缘直播流媒体服务器,边缘直播流媒体服务器进行组播后将内容分发到边缘业务接入控制点,边缘业务接入点通过接入层将内容提供给用户。 Further, when the content distribution / transmission module when live distribution, broadcast source by unicast distribution of content to the edge of the live streaming servers, live streaming edge servers to distribute content to the edge after the multicast service access control point, the edge access layer service access point providing content to the user.

下面将对各种播放分发方式进行具体描述。 The following will play a variety of distribution methods described in detail.

(1)直播分发直播源根据网络情况采用单播方式或组播方式分发到边缘节点,由边缘节点通过单播形式提供给用户。 (1) to deliver live broadcast source distribution using unicast or multicast node according to the edge network, and to provide to the user through the unicast edge node.

并且,直播源也可通过单播方式分发到边缘直播流媒体服务器由其进行组播或直接通过组播方式分发到边缘业务接入控制点,再由业务接入控制点通过接入层提供给用户。 Further, the broadcast source may be distributed by unicast to the edge live streaming server by multicast or multicast distributed directly to the edge of the access service control point, then the access provided to the service control point through the access layer user.

优选地,时移电视的内容可缓存在边缘时移服务器上,由边缘时移服务器为用户提供服务。 Preferably, the mobile television content may be cached on the server move the edge, the edge shift by the server providing services to users. 并且,网络录播的内容由内容分发网络进行录制,采用点播源的分发方式分发到边缘流媒体节点为用户提供服务。 Further, the content of the network by a taped recording a content distribution network, the distribution source of the distribution method employed on-demand streaming media to the edge node providing services to users.

(2)点播分发系统能够支持采用PUSH方式主动把用户经常访问的内容推送到边缘服务器上,包括手动分发、按区域分发、按策略分发、多中心内容分发、定时分发等多种内容分发方式。 (2) the distribution system to support on-demand use of the PUSH mode active users frequently accessed content pushed to the edge server, including manual distribution, distribution by region, according to distribution policy, multicenter content distribution, distribution of the timing, and other content distribution methods.

(3)电视录播系统或个人可以灵活的制定自动或手动录播计划,统一进行电视录播,录播生成的媒体文件存储在节点上,同时进行发布,提供回放功能。 (3) television broadcasting system or individuals can develop flexible automatic or manual recording and broadcasting programs, unified TV recording and broadcasting, on the node, while publishing and broadcasting media generated file storage, providing playback.

另外,在对于系统的操作维护方面,操作维护子模块支持对CDN Manager、CDN Agent、IPTV流媒体系统的操作维护功能。 Further, in the operation of the system for maintenance, operation and maintenance support for the sub-module operating CDN Manager, CDN Agent, IPTV streaming system maintenance functions. 实现配置管理、故障管理、性能管理等功能。 Configuration management, fault management, performance management and other functions.

重新回到图1,对图中所示的各参考点功能的描述如下:参考点A:IPTV业务管理系统与CDN Manager之间的接口。 Back to Figure 1, the reference point for each of the functions shown in FIG follows: an interface between the IPTV service management system and the CDN Manager: reference point A. 该接口功能包括:计费、URL认证、管理配置、资源上报、业务管理,等。 The interface features include: billing, URL authentication, configuration management, resource reporting, business management, and so on.

参考点B:IPTV内容管理系统与CDN Manager之间的接口。 Reference point B: the interface between the IPTV content management system CDN Manager. 该接口功能包括:通知CDN Manager将外部内容文件注入媒体库和内容发布结果返回,等。 The interface features include: notification CDN Manager injecting external content file media library and content publishing the results returned, and so on.

参考点C:操作维护与一级节点内的CDN Manager之间的接口。 Reference point C: operation and maintenance interface between a node within the CDN Manager. 该接口功能包括:告警上报、设备配置、性能查询、统计信息上报,等。 The interface features include: alarm reporting, device configuration, performance queries, statistics reporting, and so on.

参考点D:CDN Manager与CDN Agent之间的接口。 Reference point D: an interface between the CDN Manager and CDN Agent. 该接口功能包括:内容发布、计费信息上报、下发播放列表、资源信息查询报告、设备配置管理等。 The interface features include: content distribution, billing information report, issued playlist, resource information inquiry report, device configuration management.

参考点E:EPG系统与CDN Manager之间的接口。 Reference point E: an interface between the system and the EPG CDN Manager. 该接口功能包括:内容服务定向、请求频道URL列表、内容服务状态,等。 The interface features include: content service oriented requests a channel list URL, content service status, and so on.

参考点F:CDN Agent系统与流媒体系统之间的接口。 Reference point F: an interface between the system and the CDN Agent streaming system. 该接口功能包括:媒体文件管理、设备管理、频道管理、性能统计查询等。 The interface features include: media file management, device management, channel management, performance statistics inquiries.

参考点G:一级节点内的流媒体系统与二级节点内的流媒体系统之间的接口。 Reference point G: an interface system between streaming node in a streaming system within two nodes. 该接口功能主要是完成媒体流的中继。 The interface function is mainly to complete media stream relay.

参考点H:EPG系统与机顶盒之间的接口。 Reference Point H: EPG interface between the system and the set-top box. 该接口功能主要是机顶盒访问EPG系统提供的服务。 The interface is a set-top box to access the main functions of EPG service provided by the system.

参考点I:机顶盒与流媒体系统之间的接口。 Reference Point I: the interface between the STB and the streaming system. 该接口功能主要是完成媒体流的传输。 The interface function is the completion of the transmission of the media stream.

参考点J:机顶盒与CDN Agent之间的接口。 Reference point J: an interface between the STB and the CDN Agent. 该接口功能为内容服务定向,等。 The interface function for the content service orientation, and so on.

以上所述仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。 The above are only preferred embodiments of the present invention, it is not intended to limit the invention to those skilled in the art, the present invention may have various changes and variations. 凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。 Any modification within the spirit and principle of the present invention, made, equivalent substitutions, improvements, etc., should be included within the scope of the present invention.

Claims (13)

1.一种基于媒体交付的网络电视系统的媒体交付系统,其特征在于,包括:服务调度/控制模块和内容调度/控制模块,位于媒体交付管理器和/或媒体交付代理器,用于实现内容发布、内容删除/老化、以及负载均衡功能;内容存储模块,位于流媒体系统,用于进行文件操作和文件存储;流服务模块,位于流媒体系统,用于进行直播服务、点播服务、时移电视、电视录播、和带宽控制;内容分发/传送模块,位于媒体交付管理器、媒体交付代理器、和/或流媒体系统,用于进行直播分发、点播分发、电视录像;以及维护操作模块,位于媒体交付管理器、媒体交付代理器、和/或流媒体系统,用于进行操作维护。 A media delivery system based media delivery network television system, the method comprising: scheduling the service / content, and scheduling the control module / control module, located at a media delivery manager and / or agent delivery medium, for implementing the content publishing, content deletion / aging, and load balancing; content storage module, located in the streaming media system for file manipulation and file storage; streaming service module, located in streaming media systems for broadcast services, on-demand service, when shift TV, TV recording and broadcasting, and bandwidth control; content distribution / transfer module, located in a media delivery manager, media delivery agent, and / or streaming system for distributing broadcast, on-demand distribution, the television recording; and maintenance operations module, located in a media delivery manager, media delivery agent, and / or streaming media system, for operation and maintenance.
2.根据权利要求1所述的媒体交付系统,其特征在于,所述服务调度/控制模块和内容调度/控制模块对指定内容进行即时删除/老化、定时删除/老化、或根据访问量设置删除/老化门限。 2. The medium according to claim 1, delivery system, wherein the service scheduling / control module and a scheduling content / content control module specified instant delete / aging, delete timer / aging, or deleted by setting views / aging threshold.
3.根据权利要求1所述的媒体交付系统,其特征在于,所述服务调度/控制模块和内容调度/控制模块将用户点播请求在多个分布式流媒体节点之间进行自动的任务分配和负载均衡。 The media delivery system of claim 1, characterized in that the service scheduling / control module and a content scheduling / control module requests the user demand automatically distributed among a plurality of task allocation streaming node and in the claims load balancing.
4.根据权利要求3所述的媒体交付系统,其特征在于,所述服务调度/控制模块和内容调度/控制模块将用户的点播请求按照预定规则分配到适当的边缘节点,其中,所述预定规则包括:按照网络范围分配、按照节点健康度和相关依赖关系分配、按顺序服务优先级分配、按本地服务优先级分配。 4. The media delivery system of claim 3, characterized in that the service scheduling / control module and a content scheduling / control module assigned to the user demand request to the appropriate edge node in accordance with a predetermined rule, wherein the predetermined rules include: allocating the range according to the network, and the nodes allocated in the health of the relevant dependencies, service priority assigned order, service priority assigned by the local.
5.根据权利要求4所述的媒体交付系统,其特征在于,在所述点播请求被分配到边缘节点之后,所述边缘节点的局部负载均衡器根据特定因素在本节点的多个媒体服务器之间进行负载均衡,其中,所述特定因素包括:节目存放位置、并发流流量、并发流个数、服务器资源消耗。 The medium according to claim 4, wherein the delivery system, characterized in that, after the on-demand request is assigned to an edge node, the local load balancer edge node in a plurality of media servers according to factors specific node load balancing between, wherein said specific factors comprising: a program storage position, concurrent streams flow, the number of concurrent streams, server resource consumption.
6.根据权利要求1所述的媒体交付系统,其特征在于,所述内容存储模块以基于文件的存储方式或基于流化处理后的文件的存储方式来存储媒体内容。 6. The medium according to claim 1, delivery system, wherein said storage module based on the content file storage or file-based storage after storing the streamed media content.
7.根据权利要求6所述的媒体交付系统,其特征在于,所述内容存储模块在边缘存储高热度的内容,并根据内容的热度和服务提供商/内容提供商的资源状态动态地调整内容的分布。 7. The medium according to claim 6, delivery system, wherein the content in the content storage module storing high heat of the edge, and dynamically adjusts the content and service providers in accordance with the heat content of the state of the resource / content providers Distribution.
8.根据权利要求1所述的媒体交付系统,其特征在于,所述流服务模块将直播电视以实时流的方式推送到全部覆盖地区的边缘服务器上。 8. The media delivery system of claim 1, wherein said streaming service module in real time live TV stream pushed to cover all areas on the edge server.
9.根据权利要求8所述的媒体交付系统,其特征在于,所述流服务模块管理多个业务运营商的并发视频服务,对每个业务运营商的并发数进行配额管理,其中,不同的业务运营商使用独占的流媒体服务并发数。 9. The media delivery system of claim 8, wherein said streaming service module to manage multiple concurrent video service operator service, the number of concurrent quota management of each service operator, wherein the different service operator the exclusive use of the number of concurrent streaming media services.
10.根据权利要求1所述的媒体交付系统,其特征在于,所述流服务模块按照点播节目的热度,将热度高的节目调度到边缘节点,将冷门节目调度到一级节点,其中,当点播的内容存在于所述边缘节点时,所述边缘节点的相应流媒体服务器向用户发发送媒体流,当点播的内容不存在于所述边缘节点时,调度存在所述内容的一级节点或区域一级节点向用户发送媒体流。 10. The medium of claim 1, wherein the delivery system, wherein the service module in accordance with the heat flow demand program, the program schedule high heat to the edge node, the popular program schedule to a node, wherein, when a corresponding node-demand streaming media content server is present in the edge node, the edge node transmits a media stream sent to the user, when the content-on-demand is not present in the edge node, the presence or the content of the schedule a node sending the media stream to the user area.
11.根据权利要求1所述的媒体交付系统,其特征在于,所述流服务模块支持服务质量控制,还能够设置每个节点向用户提供流服务的最大带宽和最大连接数目。 11. The media delivery system of claim 1, wherein said streaming service support quality of service control module, also possible to provide the maximum bandwidth and the maximum number of connections per node providing a streaming service to a user.
12.根据权利要求1所述的媒体交付系统,其特征在于,当所述内容分发/传送模块进行直播分发时,直播源通过单播方式或组播方式将内容分发到边缘节点,由所述边缘节点通过单播形式提供给用户。 12. A medium according to claim 1, delivery system, wherein, when the content distribution / transmission module for live distribution, the distribution of broadcast content to the source edge node by unicast or multicast mode, by the edge node to the user via unicast.
13.根据权利要求1所述的媒体交付系统,其特征在于,当所述内容分发/传送模块进行直播分发时,直播源通过单播方式将内容分发到边缘直播流媒体服务器,所述边缘直播流媒体服务器进行组播后将内容分发到边缘业务接入控制点,所述边缘业务接入点通过接入层将内容提供给用户。 13. A medium according to claim 1, delivery system, wherein, when the content distribution / transmission module for live distribution, the broadcast source distribution content by unicast live streaming server to the edge, the edge of live after streaming server multicast distribution content to the edge of the access service control point, the edge access layer service access point by providing content to the user.
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